EP0428356A2
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EP
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Pattern generation method and pattern generation apparatus
Assignee: Canon Inc
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Filing: 1990-11-12
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Granted: —
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Expires: 2010-11-12
Abstract
Abstract In a pattern generation method, corresponding binary bit map data is generated based on desired one of vector font data, an area of the binary bit map data on a memory is divided to judge a density in a predetermined area, and digital multi-value data is generated in correspondence with the judged density. There is also disclosed a pattern generation apparatus for carrying out this method.
Inventors
- 👤 Tsuneaki Kurumida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 12:38
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/40068; G; G06; G06K; G06K15/00; G06K15/02; G06K15/12; G06K15/1204; G06K15/1223; G06K15/128; G09; G09G; G09G5/00; G09G5/22; G09G5/24; G09G5/28; H04N1/40075; G06K2215/00; G06K2215/0002; G06K2215/004; G06K2215/0042; G06K2215/0045; G06K2215/006
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
56 words
A pattern generation apparatus comprising: storage means for storing binary bit map data; judgment means for dividing an area of the bit map data stored in said storage means, and judging a density in a predetermined area; and generation means for generating corresponding digital multi-value data in accordance with the density judged by said judgment means.
Claim 2
Dependent Claim
56 words
A pattern generation apparatus comprising: storage means for storing binary bit map data; judgment means for dividing an area of the bit map data stored in said storage means, and judging a density in a predetermined area; and generation means for generating corresponding digital multi-value data in accordance with the density judged by said judgment means.
Claim 3
Dependent Claim
27 words
An apparatus according to claim 1, further comprising conversion means, having vector fonts, for converting desired data of the vector font into the binary bit map data.
Claim 4
Dependent Claim
44 words
An apparatus according to claim 1, further comprising printer means for receiving said multi-value data, converting said multi-value data into an analog image signal, and comparing the analog image signal with a triangular wave having a predetermined period to form a pulse-width modulated signal.
Claim 5
Dependent Claim
24 words
An apparatus according to claim 1, further comprising printing means for controlling ink injection in accordance with said multi-value digital data to express gradation.
Claim 6
Dependent Claim
52 words
A pattern generation method comprising the steps of: generating corresponding binary bit map data based on desired one of vector font data; dividing an area of the binary bit map data on a memory; judging a density in a predetermined area; and generating digital multi-value data in correspondence with the judged density.
Claim 7
Dependent Claim
52 words
A pattern generation method comprising the steps of: generating corresponding binary bit map data based on desired one of vector font data; dividing an area of the binary bit map data on a memory; judging a density in a predetermined area; and generating digital multi-value data in correspondence with the judged density.
Claim 8
Dependent Claim
28 words
A method according to claim 5, wherein the step of judging the density comprises the step of judging a distribution state of a pattern in the predetermined area.
Claim 9
Dependent Claim
44 words
A method according to claim 5, further comprising printer means for receiving said multi-value data, converting said multi-value data into an analog image signal, and comparing the analog image signal with a triangular wave having a predetermined period to form a pulse-width modulated signal.
Claim 10
Dependent Claim
55 words
A pattern generation method comprising the steps of: generating multi-value digital data on the basis of vector data; and converting the multi-value digital data into an analog image signal, and comparing the analog image signal with a triangular wave having a predetermined period to pulse-width modulate the analog image signal, thereby outputting a gradation pattern.
Claim 11
Dependent Claim
55 words
A pattern generation method comprising the steps of: generating multi-value digital data on the basis of vector data; and converting the multi-value digital data into an analog image signal, and comparing the analog image signal with a triangular wave having a predetermined period to pulse-width modulate the analog image signal, thereby outputting a gradation pattern.
Claim 12
Dependent Claim
39 words
A method according to claim 8, wherein the multi-value digital data is obtained by generating a binary bit map pattern based on the vector data, and judging a density based on a distribution of the binary bit map pattern.
Claim 13
Dependent Claim
70 words
A pattern generation apparatus comprising: generation means for generating multi-value digital data on the basis of vector data; means for converting the multi-value digital data into an analog image signal, and comparing the analog image signal with a triangular wave having a predetermined period to obtain a pulse-width modulated signal; and laser output means for outputting a gradation image based on the pulse-width modulated signal obtained by said converting means.
Claim 14
Dependent Claim
70 words
A pattern generation apparatus comprising: generation means for generating multi-value digital data on the basis of vector data; means for converting the multi-value digital data into an analog image signal, and comparing the analog image signal with a triangular wave having a predetermined period to obtain a pulse-width modulated signal; and laser output means for outputting a gradation image based on the pulse-width modulated signal obtained by said converting means.
Claim 15
Dependent Claim
40 words
An apparatus according to claim 10, wherein said generation means converts the vector data into the binary bit map data, and judges a density based on a distribution of a bit pattern so as to generate the multi-value digital data.
Claim 16
Dependent Claim
67 words
An image processing apparatus including a store means in which the arrangement of stored data is such that successive bits relate to continuous spacial lines of the image, characterised in that a plurality of bits are allocated to represent a single image point and in that the number of said plurality of bits which are set relates monotonically to the density of the image at that point.
Claim 17
Dependent Claim
67 words
An image processing apparatus including a store means in which the arrangement of stored data is such that successive bits relate to continuous spacial lines of the image, characterised in that a plurality of bits are allocated to represent a single image point and in that the number of said plurality of bits which are set relates monotonically to the density of the image at that point.
Claim 18
Dependent Claim
39 words
Apparatus according to claim 12 in which N bits are allocated to each image point, and each image point can exhibit N+1 possible density levels, each density level corresponding uniquely to a given number of said bits being set.
Claim 19
Independent Claim
72 words
A method of generating a digitally stored image representation comprising the steps of setting, for each image point, the value of a binary location within a memory in which an array of such locations are mapped onto corresponding image points, characterised in that it comprises also the steps of determining the density of the image at the point, and setting a predetermined number of bits proportional to the density within the memory.
Claim 20
Independent Claim
72 words
A method of generating a digitally stored image representation comprising the steps of setting, for each image point, the value of a binary location within a memory in which an array of such locations are mapped onto corresponding image points, characterised in that it comprises also the steps of determining the density of the image at the point, and setting a predetermined number of bits proportional to the density within the memory.
Claim 21
Dependent Claim
25 words
A bit map image processing apparatus comprising means for expanding a bit map image so that a plurality of bits correspond to a given pixel.
Claim 22
Dependent Claim
25 words
A bit map image processing apparatus comprising means for expanding a bit map image so that a plurality of bits correspond to a given pixel.
References Cited (Backward Citations)
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